Jay

I meet a guy at work i really like
We'll call him Jay .
I told I like him we talk on whatsapp and work together sometimes.
He said he likes me and I told him that I like him too , but I feel like , how could he like me ?
I feel awkward and I feel fat and ugly.
I haven't seen him outside of work ,he said it could be arranged but I don't think is going to happen , I don't think he will go out with me.
Why would he ?